"Et rien ne fut plus comme avant …" in the series Musique et Physique,
Lectures to Celebrate the Fiftieth Anniversity of CERN, the Hundredth Anniversary of Einstein's
Annus Mirabilis, and the World Year of Physics,
Physics Department, University of Geneva, February 1, 2005: PDF (6.9 MB) or
QuickTime (9.4 MB),
in French.